Lubricator



Feb.19,1935. L E H, MOROW M l1,991,408

LUBRICATOR Original Filed Dec. 22, 1930 Perenfed Feb. 1e, 193'5LUBRICATOR Emmet ll. lMorrow and John C. Morrow-Chicago,A111.,.,assignors to T. H. Gauthreaux, hicago, Ill.

' Applicatie neeember 2z, 1930, serial No. 504,021

Renewed July 9, 1934.`

' Claims. (Cl. 221-51'.)

This invention relates to a lubricator and particularly to one fordischarging oil at high pressure into an oil aperture.

An object of the invention is to provide a lubricator whereby oil may beejected therefrom under high pressure. l

" Another object of theinvention is to provide a lubricator having aspout withacylindrical portion therein in which portion a pistonismovable for trapping-a charge of oil'and ejecting said charge under highpressure,

. Another object of the invention is to provide `a lubricator of thetype employing -a discharge spout wherein oil may be ejectedunderpre'ssure irrespective of the position of the lubricator.vl

A yet further object of theinvention is to provide a lubricator of thespout type in which the spout is fashioned with a cylindrical portionwherb'y a charge of oil maybe trapped in said cylindrical portion, and'including a plunger which on one4 Vstroke thereof serves to eject theentrapped charge under pressure and entrap anothercharge on the nextstroke.

A still further object of the invention is to provide a lubricator ofthe spout type wherein a, piston is movable within the spout forentrapping and discharging a charge vof oil under pressure and in whichprovision is made to prevent accidental displacement of the parts whenthe spout is disconnected.

- According to the invention, the spout 'of a lubri- Vcator of the spouttype is provided with a cylindrical portion for a portion of its lengthand has a piston movable in the cylindrical portion. A

' plunger in the lubricator body is provided to move the piston in thedirection to eject Ior open the spout and a spring is provided forreturning ther Figure 1 is a side elevational view of a lubricatorembodying the present invention.

Figure 2 is an enlarged elevational view of a fragmental portion of thespout showing the body of the lubricator in section, and illustratingcertain features of construction.

Figure 3 is an enlarged broken vertical sectional view through thespout, showing the illustrated embodiment of the ther. detail.Alubricator consisting of a body 1 is illustrated herein as of theconventional can type, al-

though the invention is not limited to the can 5 type. l l

The body 1 is provided with an inwardly dished bottom 2 which is securedto the lower margin of the body l'by having the edges of the bottom 2crimped over' the margins -of the body 1 forming a bead 3. Thisconnection is, of course, liquid tight.

The illustrated form of lubricator discloses the body v1 as having itsupper end ufashioned conically as at 4 and terminating in a neck 5 whichis threaded. The upper margin of 'the neck 5'is' inturned forming a bead6. Y f

A sleeve 7 is securedin a. centrally disposed aperture of the bottom 2and extends upwardly, terminating adjacentthe neck 5. The sleeve issecured in the bottom 2 by having its lower end crimped over the outersurface 'ofthe central portion of the bottom 2 as atl! and soldered withsolder at 9 on the interior of the bottom` about the sleeve 7. 'I'heupper lend of the sleeve 7 is outturned, forming a bead 10.

A plunger 11 is movable within the sleeve 7 and has its lower endextending throughthe lower end of the sleeve, Where it is provided witha head 12 for applyingpressure to the plunger 11 in order to eject oilfrom the lubricator. y

A spring 13 is arranged about the plunger 11 outwardly of the bottom 2.and lies between the bottom 2 and the inner surface of the head v12 ofthe plunger.

The upper end of ,theplunger 11 is provided with a stop collar 14resting against" the bead' of the sleeve v7 to prevent inward movementof the plunger within the sleeve 7 beyond the determined point. Theupper end of the plunger 11 is pointed at 15. 1

A cap 16 is threaded onto the neck l5 and is provided with an aperture17 in which a cylindrical member 18 is fastened. The member 18 isprovided with an annular shoulder '19 for restingv against the topsurface of .the c ap 1 6 and with a portion 20 for'entering the aperture17 in the cap. 'I'he .inner end of the portion 20, .after thecylindrical member 18 is inserted in the aperture 17 is swe'dged orcrimped overforming an inner flange 21 cooperating with the outer flangey 19 to secure the cylindrical portion 18 in the cap.- -A ring washer 22is inserted against the under surfaceof the cap 16 about the`aperture 17therethrough for increasing the thickness ofthe 'cap u invention infurchambers of different sizes. 30'

portion 18,

A-gasket 23 is secured within the cap 16 for sealing the joint betweenthe cap 16 and the bead 6 of the neck 5 in order to prevent escape oflubricant at this point.` z i The cylindrical ber 18 is provided with acentral uniform bore 24 in which a piston 25 is arranged for axialmovement.

The piston 25 has a counterbored portion 26 and a lower portion 27of'reduced diameter. The latter portion 2'7 is bored from end to end,providing a passage 28 through the same.`

The piston 25 has' a shoulder 29 formed at the junction of the lowerportion 27 and the body portion 25 of the piston. This shoulder 29'restsagainst the ange 21 formed from the lower end of the cylindrical memberA18 at the time the said lower member is swedged to serve to prevent theescape of the piston 25 from the lower end of thef'cylindrical member 18when the cap 16 is removed from the body 1.

The upper end of the cylindrical member 18 is provided with externalthreads 30 for receivinga cap 31 having internal threads in its skirtportion for securement to the cylindrical portion 18.

The cap 31 is bored from end to end forming' The lowermost chamber 32communicates with the upper end of the cylindrical portion 18.A Anintermediate chamber 33 within lthe cap is of less diameterthan thechamber 321,V The walls of the member 31 between the lchambers 32 and 33are inclined outwardly from the chamber' 33 to the chamber 32'providingan annular inclined shoulder 34.

A cage having an inclined surface 35 and a hollow body 36 is disposedwithin the chamber 33 of the cap 31. The top 37 of the cage isimperforate. There are provided two side openings 38one of which isshown in Figure 3, allowing communication between the interior of thecage andthe chamberi 33. The lower portion of the cage is provided withan opening 39. which is normally closed by a ball 40 pressed againstsaid opening by means of a spring 41 within the cage and engaging theunder surface of the top 37 thereof and the ball 40. The cage is movablewlthinthe cap 31.

A spring 42 is, when the cap 31 and cylindrical member 18 are assembled,interposed between the piston 25 and the under surface of the cage. Thisspring is an expansion spring and tends to maintain the cage up againstthe annular shoulder 35 of the cap 31, an'd tends to move the piston 25awayfrom the cage and maintain the same against theshoulder 21 of themember 18.

'A-spout .43 is threaded into the upper end of the cap 31. The spout maybe cylindrical and v`o1' uniformfdiameter, or it may taper toward thedischarge point as desired.

An` oil Vseal member 44 is removably arranged within the endvof thespout 43. v The oil seal membei' is provided with a convex end 45 ofyielding material to effectively seal connection between the end of thespout and an oil fitting, so that when the plunger 11 is actuated theVfull force of the pressure created thereby will be eiective todischarge-oil into the'oiliitting. The oilA seal 44 is provided with atip 46 for entering an oil fitting or oil hole to discharge oil into thesame, the tip 46 being apertured to allow escape of oil through thesame. u

The pats are so arranged that whenthe plunger 7' is in retracted ornormal position, which is the position shown in Figure 2, theplston 25will have the lower end of the bore 28 and the inward extension 27thereof spaced slightly. from the plunger, so that when the lubricatoris tilted, oil will enter the vbore 28 in the piston 25 and theprevented from escape by reason Aoi! the spring pressed ball 40 whichcloses the opening 39 through the cage except as hereinafter described.

Figures 2 and 3 show the arrangement and disposition of parts when innormal or inactive position, that is, the position the parts assume whenthe lubricator is not being used.'

vThe operation is as follows:

The body 1 is illled with oil or proper lubricant through the neck 5,the cap 16, of course, having been removed. The provision of the sleeve7 pre- Vents leakage of the lubricant through the bottom 2 of the can.The cap 16 is then applied to the neck and the lubricator ready for use.The operator applies the oiling seal 45 to the oil aperture by tiltingthe lubricator whereupon oil enters the cylindrical member 18,` fillingthe i same. AThe operator then applies pressure to the Pressure on theplunger 11 chamberl within the cylindrical member 18 being vthe cagethen the oil is forced through the spout 43 into the oil fitting orhole.v The operator releases pressure on the head 12 of the plunger 11as soon as he has pushed the same inwardly once,

Alubricator thereupon delivers more lubricant into the cylindricalmember 18 ready for another shot when desired.

The provision of the ball valve serves to prevent leakage and drippingfrom the end of the spout should the can be inadvertently overturned orput away with the spout in position.

The provision of the annular shoulder 29 for operating with the l innerannular shoulder formed by the switching of the lower end of thecylindrical member 18 prevents displacement of the piston 25 and thespring 42 whenever the cap 16 is removed from the body 1.

l The spacing of the pointed end 15 of the plunger 11 from the piston.25allows entrance of,oil into the cylindrical member 18 whenever thelubricator is tilted, thus assuring at all times the supply of oilwithin the cylindrical member 18 ready to be trapped and dischargedunder pressure whenever the plunger 11 is actuated.

The invention is not limited to the use of the oiling seal 44, such asillustrated, as any suitable seal or tip may be applied to the nozzle 43to accommodate the lubricator-to any type of tting or oil receivingaperture.

'I'he cage 36 is movable within the cap 31 and may be removed from saidcap when the cap is any but upright ,disconnected from the cylindricalmember 18.

`removed from the cylindrical member 18 when the cap 31 is detached fromthe same, should occasion arise.

The construction of a lubricator made in accordance with this inventionprovides a lubricator wherein oil pressure of several hundred pounds maybe created for proper lubrication purposes. 'Ihe parts are so arrangedas to be readily and economically manufactured and assembled and at thesame time, provide a structure which is strong, efficient, durable, andsatisfactory for the purposes intended.

The oiling seal 44 may be frictionally retained Within the end of thespout 43 or it might be screw threaded if desired.

The amount4 of pressure of oil being discharged from this lubricator maybe regulated by the spring 41. A light spring, of course, will yield tolower pressure than will a stiier spring; consequently, the selection ofa proper spring will` result in the creation of suliicient pressurewithin the cylindrical member 18 to open the valve 40 against the actionof the spring 41, thus allowing discharge of lubricant under suchpressure.

A lubricator made in accordance with this invention has been found veryuseful in applying oil to machine parts, automotive parts, and the like,where it is desired to inject oil for lubrication purposes and alsoforthe purpose of cutting away any accumulated grease or like lubricantwhich has heretofore been used and which has become useless because oisolidification or otherwise.

The invention has been described herein more or less precisely as todetails, yet it is to be understood that the invention is not to belimited thereby, as changes may be made in the arrangement andproportion of parts and equivalents may be substituted. withoutdeparting from the,v

spirit and scope of the invention.

The invention is' claimed as follows: 1. A lubricator including a body,a cap removably associated with said body, av cylindrical portionsupported by said cap, a bored piston movable within said cylindricalportion' and communicating with the interior of the body through vsaidbore, a spout connected to said cylindrical portion, a normally closedvalve. between said cylindrical portion and said spout, land a plungeroperable through the bottom of the ybody for moving said piston towardsaid valve to eject oil past said valve, the end of the cylindricalportion adjacent the cap being provided with a shoulder to preventescape of said piston through that end land supporting said spout, acylindrical member attached to said cap, a second cap removably securedto said cylindrical portion above said rst cap, a cage removablydisposed within said second cap above said cylindrical portion, saidcage containing a valve arranged to open toward the discharge end of thespout, a spring within said cage for normally maintaining said valve inclosed position, said cage having lateral discharge openings, a pistonslidable in said cylindrical portion, said piston having an oiladmission port therein, a plunger in said body and operable through thebody bottom for closing said oil ad`- mission port and moving saidpiston toward said cage, and a spring for moving said piston in theopposite direction, said-cylindrical portion being provided with meansfor preventing excessive movement of said piston away from said cage.

4. A lubricator including a. can body, a spout removably associated withsaid body, said spout having a movable bored piston in a portion thereofcommunicating with the interior of the cam body through said bore foroil passage past said piston, avalve above said piston and maintainednormally in closed position, a shoulder engaging said piston forlimiting its movement away from said valve and also for preventingdislodgment of the same from said spout,` and a'plunger operable throughthe bottomof the bodyfor moving said piston toward said valve to ejectoil past said valve. l

. 5. A l bricator including a can body, a cap removably associated withsaid body, a cylindrical member secured to said cap, a piston movable insaid cylindrical kmember and having a portionopenings therein, a ballwithin said cage member' for normally closing said valve seat opening, aspring for urging said ball against said opening, and a plunger formoving said piston in a direction to discharge oil past saidv valve andthrough said valve seat opening when said piston is moved toward saidvalve, said valve closing against its seat on release of pressureagainst said plunger..

Emmi' H. Monnow. JOHN c.A Monaow.

